Loans and Allowance for Credit Losses - Non-TDR Loan Modifications due to COVID-19 (Details) - CARES Act Modification $ in Thousands	6 Months Ended
	Jun. 30, 2021 USD ($) deferral	Dec. 31, 2020 USD ($)
Financing Receivable, Modification [Line Items]
Deferrals Balance	$ 21,681	$ 63,902
Number of Deferrals | deferral	261
Commercial and commercial real estate
Financing Receivable, Modification [Line Items]
Deferrals Balance	$ 17,313	53,823
Number of Deferrals | deferral	40
Second deferrals between 90 and 180 days, amount	$ 2,500
Residential real estate
Financing Receivable, Modification [Line Items]
Deferrals Balance	$ 264	1,855
Number of Deferrals | deferral	4
Second deferrals between 90 and 180 days, amount	$ 100
Consumer credit
Financing Receivable, Modification [Line Items]
Deferrals Balance	$ 4,104	$ 8,224
Number of Deferrals | deferral	217
Second deferrals between 90 and 180 days, amount	$ 600